Contact Bob at Racing Research in Clinton Township, Michigan. he has over 30 years in the machine shop business and is top notch. He can explain balancing so you can understand it. Lots of bad info out there. But yes, internally balancing is the best way to go for simplicity, and in case you fail a convertor or damper, you can simply replace them with a neutrally balanced part. Bob can be reached at 586-949-3790. They build engines and transmissions there too, Mopar specialists.
Engine dynos are almost up and running. A Superflow for 1000 HP and another that is capable pf 3000 hp for you balls to the wall racers.